Valves with metering sleeves

A valve comprising:

• a housing having an inlet and an outlet;
• a spool fixed within the housing and defining a flow window therethrough for fluid communication between the inlet and the outlet;
• a piston slidingly engaged in a piston compartment of the spool, wherein the spool includes an impingement wall dividing the piston compartment from an upstream compartment of the spool, wherein the impingement wall is proximate the flow window to absorb fluid momentum forces to reduce contaminant impingement proximate the flow window, wherein the impingement wall defines a restrictor orifice therethrough for fluid communication between the upstream compartment and the piston compartment to provide for dampened motion of the piston;
• and
• a sleeve slidingly engaged with the spool on an outer surface of the spool, wherein the piston and sleeve are operatively connected for common motion along a sliding axis relative to the spool and housing between a first position in which the sleeve occludes the flow window to inhibit flow from the inlet to the outlet, and second position in which the sleeve unoccludes the flow window to allow flow from the inlet to the outlet, wherein the flow window and outlet are axially proximate to one another with respect to a longitudinal axis defined by the sleeve.